Iphone 4S no power on, short somewhere – iphone problem , and strang issue solution

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Iphone 4S no power on, short somewhere – iphone problem , and strang issue solution

On January 23, 2015, Posted by , In iPhone, With Comments Off on Iphone 4S no power on, short somewhere – iphone problem , and strang issue solution

Bit of background: a few months ago I used a bad charger and the power protection circuit broke, so I could only charge the phone when off, and couldnt sync it. Getting a new phone so thought I attempt a repair and would sync it one last time so I could get all my data off etc.


Tried to jumper L3 & L4, but something has gone wrong and now I cant power on. The power management unit (I think) gets very hot when battery is plugged in. Not so bad Along with USB but still cant turn on.

Do I want to replace the chip? Cant find anywhere that has the exact same symptoms. Thanks!

No Comment so far:

  1. TechWorld says:

    Bit of background: a few months ago I used a bad charger and the power protection circuit broke, so I could only charge the phone when off, and couldnt sync it. Getting a new phone so thought I attempt a repair and would sync it one last time so I could get all my data off etc.

    Tried to jumper L3 & L4, but something has gone wrong and now I cant see the LCD. The power management unit (I think) gets very hot under some situations.

    I thought it wasnt powering on but by using the vibrating switch I realised it is on, I just cant see anything. All I want is to sync it one last time, not too worried about getting the screen back. Thanks!

  2. ExpertBuddy says:

    Have you got a microscope? have a look at the lcd connector, see if any of the filters are missing, also check the capacitors for a short, and check L18/L19, D4.

  3. TechGuru says:

    L18/L19 seem fine, cant see contacts on D1 to check?